The 26-year-old actor was left devastated last month when his girlfriend admitted to cheating on him with married director Rupert Sanders but friends say he now believes her infidelity was just a 'moment of stupidity' and he is keen for a face-to-face meeting to try and repair their three-year relationship.

According to Perezhilton.com Rob wants to show Kristen Stewart what she's possibly thrown away. He's spent a fortune in the past two weeks on his hair, teeth whitening and a spray tan. He's bought an array of Gucci suits, which cost £2,000 a pop and he's stepping up his exercise regime with trainer Tamsyn Hamilton to get in shape."

However, a source said: 'They talked [on the phone] for about an hour - it was very emotional...

'Kristen begged to meet face-to-face so they could talk. It was obvious she was getting through to Rob and he has agreed to see her.

'Even though she made a horrendous mistake, Rob can't just switch off his feelings. He was madly in love with her and I think believes that it was a moment of stupidity, not a long, drawn-out affair and it'd never happen again.

'In Rob's eyes, Kristen was seduced and she's clearly not just sorry but completely destroyed by what she's done.'

However, if the 'Cosmopolis' star does agree to making another go of their relationship, he wants to establish some 'ground rules'.

The source continued to LOOK magazine: 'If Rob decides to take her back, he'll have some ground rules.

'Kristen would have to spend more time in his hometown of London. He also would want them to adopt the Angelina Jolie and Brad Pitt way of working - where they take it in turns to do a film so they can be around for time together.'